problem with system preference for mouse
I have two older Mac Pros. Having recently bought a new Mac, I've been setting these up to run older software using OS 10.10.5 Yosemite. I installed the OS on two 1TB SSD drives. One went in the older Mac Pro, a 2009 I think, the other went in a 2012. Same installer, a boot disk I made with generous help from here.
The older Mac Pro is so far absolutely perfect. The newer one however has a strange mouse System Preference for Mouse that thinks all mice are the old ones with a roller on top and buttons on the sides. I can use my Magic Mouse 2 with this computer but I can't set it up properly. And it thus doesn't really work right. On the older Mac Pro, I have the modern Mouse Preference that has a little color video of the mouse and fully accommodates the Magic Mouse 2. That mouse works great.
How can I fix this problem? Is there some buried piece of software that's missing on the newer Mac Pro that I could copy and paste over to the new one? I really don't feel like reinstalling the entire system and migrating all over again. It took all day. Twice.
Thanks in advance!
Mac Pro, OS X 10.10
